TWI744996B - Optical imaging lens - Google Patents

Abstract

An optical imaging lens includes a first lens element to a sixth lens element from an object side to an image side in order along an optical axis, and each lens element has an object-side surface and an image-side surface. A periphery region of the image-side surface of the sixth lens element is convex. The optical imaging lens has only six lens elements, the sum of the five air gaps from the first lens element to the sixth lens element on the optical axis is greater than the sum of the thicknesses of the six lens elements from the first lens element to the sixth lens element on the optical axis, the maximum air gap is between the second lens element and the third lens element, and the object-side surface and the image-side surface of one of the second lens element to the fifth lens element are aspheric surface, and the following condition is satisfied: 2.000≦EFL/ImgH.

Description

Optical imaging lens

The present invention generally relates to an optical imaging lens. Specifically, the present invention is particularly directed to an optical imaging lens that is mainly used for photographic electronic devices such as shooting images and video recording. Optical imaging lens for integrated electronic devices.

The specifications of portable electronic products are changing with each passing day. One of its key components: optical imaging lenses are also developing more diversified. The applications of optical imaging lenses are not limited to shooting images and videos, but also the needs of telephoto cameras, which can be achieved with wide-angle lenses. The function of optical zoom. If the effective focal length of the telephoto lens is longer, the magnification of the optical zoom is higher.

When the effective focal length of the optical imaging lens is increased, the aperture value will increase, and at the same time the amount of light entering will decrease. Therefore, how to increase the effective focal length of the optical imaging lens while maintaining the aperture value, maintaining the imaging quality, reducing the assembly difficulty and improving the manufacturing yield is one of the topics that need to be discussed in depth.

Therefore, in order to solve the above-mentioned problem, each embodiment of the present invention proposes a six-piece optical imaging lens. The six-piece optical imaging lens of the present invention is sequentially arranged with a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens on the optical axis from the object side to the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens each have an object side surface that faces the object side and allows imaging light to pass, and an image that faces the image side and allows imaging light to pass. side.

In an embodiment of the present invention, the circumferential area of the image side surface of the sixth lens is convex, and the optical imaging lens is composed of the above six lenses. The sum of the five air gaps on the optical axis of the first lens to the sixth lens Greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis, the largest air gap is between the second lens and the third lens, and the object side and the image side of one of the second to fifth lenses are It is aspherical and satisfies the following conditional formula: 2.000≦EFL/ImgH, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens.

In an embodiment of the present invention, the first lens has positive refractive power, and the optical axis area on the image side of the sixth lens is convex. The optical imaging lens is composed of the above six lenses. The sum of the five air gaps on the optical axis is greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis, the largest air gap is between the second lens and the fourth lens, and the second lens to the fifth lens The object side and image side of one lens are aspherical and satisfy the following conditional formula: 3.200≦EFL/ImgH, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens.

In an embodiment of the present invention, the second lens has negative refractive power, the circumferential area of the object side of the fourth lens is concave, and the circumferential area of the image side of the sixth lens is convex. The optical imaging lens consists of the above six The composition of the lens, the sum of the five air gaps on the optical axis of the first lens to the sixth lens is greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis, and the largest air gap is between the first lens and the second lens. Among the four lenses, the object and image sides of the second lens to the fifth lens are aspherical and satisfy the following conditional formula: 2.900≦EFL/ImgH, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as The image height of the optical imaging lens.

In the optical imaging lens of the present invention, the embodiments may also selectively satisfy the following conditions:

(1) 0.800≦EFL/TTL;

(2) 1.100≦EFL/TL;

(3) 2.000≦EFL/ALT;

(4) L12t61/AAG≦1.600;

(5) L12t41/(T1+T6)≦3.000;

(6) L41t62/T1≦3.600;

(7) υ1+υ2+υ3+υ4+υ5+υ6≦255.000;

(8)υ2+υ3+υ4+υ5+υ6≦200.000;

(9) υ2+υ3+υ4+υ5≦170.000;

(10) L11t42/(G23+G34)≦2.000;

(11) L21t52/(G23+G45)≦2.500;

(12) L12t61/(G23+G56)≦2.700;

(13) (ALT24+G12+BFL)/Gmax≦2.220;

(14) (ALT35+G12+BFL)/Gmax≦2.620;

(15) (ALT46+G12+BFL)/Gmax≦2.320;

(16) (G12+G34+BFL)/T1≦5.320; and

(17) 2*ImgH*Fno/EFL≦2.020.

Among them, T1 is defined as the thickness of the first lens on the optical axis; T2 is defined as the thickness of the second lens on the optical axis; T3 is defined as the thickness of the third lens on the optical axis; T4 is defined as the fourth lens on the optical axis T5 is defined as the thickness of the fifth lens on the optical axis; T6 is defined as the thickness of the sixth lens on the optical axis; G12 is defined as the air gap between the first lens and the second lens on the optical axis; G23 Defined as the air gap between the second lens and the third lens on the optical axis; G34 is defined as the air gap between the third lens and the fourth lens on the optical axis; G45 is defined as the fourth lens and the fifth lens on the optical axis G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis; ALT is defined as the total thickness of the six lenses on the optical axis from the first lens to the sixth lens; TL is defined as the first lens The distance from the object side of a lens to the image side of the sixth lens on the optical axis; TTL is defined as the distance from the object side of the first lens to the imaging surface on the optical axis; BFL is defined as the image side to the imaging surface of the sixth lens The distance on the optical axis; AAG is defined as the sum of the five air gaps from the first lens to the sixth lens on the optical axis; EFL is defined as the effective focal length of the optical imaging lens; Gmax is the first lens to the sixth lens on the optical axis The largest air gap above; Fno is defined as the aperture value of an optical imaging lens.

Another definition in the present invention: ALT24 is the sum of the three thicknesses of the second lens to the fourth lens on the optical axis, that is, the sum of T2, T3, and T4; ALT35 is the three thicknesses of the third lens to the fifth lens on the optical axis. The sum of three thicknesses, that is, the sum of T3, T4, and T5; ALT46 is the sum of the three thicknesses of the fourth lens to the sixth lens on the optical axis, that is, the sum of T4, T5, and T6; L12t62 is the image of the first lens The distance from the side to the image side of the sixth lens on the optical axis; L12t41 is the distance from the image side of the first lens to the object side of the fourth lens on the optical axis; L41t62 is the distance from the object side of the fourth lens to the sixth lens The distance from the image side on the optical axis; L11t42 is the distance from the object side of the first lens to the image side of the fourth lens on the optical axis; L21t52 is the distance from the object side of the second lens to the image side of the fifth lens on the optical axis L12t61 is the distance from the image side of the first lens to the object side of the sixth lens on the optical axis.

The terms "optical axis area", "circumferential area", "concave surface" and "convex surface" used in this specification and the scope of the patent application should be interpreted based on the definitions listed in this specification.

The optical system in this specification includes at least one lens, which receives the imaging light from the incident optical system parallel to the optical axis to the half angle of view (HFOV) angle relative to the optical axis. The imaging light passes through the optical system to form an image on the imaging surface. The term "a lens has positive refractive power (or negative refractive power)" means that the paraxial refractive power calculated by the lens according to Gaussian optics theory is positive (or negative). The so-called "object side (or image side) of the lens" is defined as the specific range of the imaging light passing through the lens surface. The imaging light includes at least two types of light: chief ray (chief ray) Lc and marginal ray (marginal ray) Lm (as shown in Figure 1). The object side (or image side) of the lens can be divided into different areas according to different positions, including the optical axis area, the circumferential area, or one or more relay areas in some embodiments. The description of these areas will be detailed below Elaboration.

FIG. 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: the center point and the conversion point. The center point of the lens surface is an intersection point of the surface and the optical axis I. As shown in FIG. 1, the first center point CP1 is located on the object side surface 110 of the lens 100, and the second center point CP2 is located on the image side surface 120 of the lens 100. The conversion point is a point on the surface of the lens, and the tangent to the point is perpendicular to the optical axis I. The optical boundary OB that defines the lens surface is the point where the edge ray Lm passing through the radially outermost edge of the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, if there are multiple conversion points on the surface of a single lens, the conversion points are named sequentially from the first conversion point in a radially outward direction. For example, the first conversion point TP1 (closest to the optical axis I), the second conversion point TP2 (as shown in FIG. 4), and the Nth conversion point (the farthest from the optical axis I).

The range from the center point to the first conversion point TP1 is defined as the optical axis area, where the optical axis area includes the center point. The area from the Nth conversion point farthest from the optical axis I radially outward to the optical boundary OB is defined as a circumferential area. In some embodiments, it may further include a relay area between the optical axis area and the circumferential area, and the number of relay areas depends on the number of switching points.

When the light parallel to the optical axis I passes through an area, if the light is deflected toward the optical axis I and the intersection with the optical axis I is on the lens image side A2, the area is convex. After the light rays parallel to the optical axis I pass through an area, if the intersection of the extension line of the light rays and the optical axis I is located at the object side A1 of the lens, the area is concave.

In addition, referring to FIG. 1, the lens 100 may further include an assembly portion 130 extending radially outward from the optical boundary OB. The assembling part 130 is generally used for assembling the lens 100 to a corresponding element of the optical system (not shown). The imaging light does not reach the assembling part 130. The structure and shape of the assembling part 130 are only examples for illustrating the present invention, and the scope of the present invention is not limited thereby. The lens assembly 130 discussed below may be partially or completely omitted in the drawings.

Referring to FIG. 2, the optical axis zone Z1 is defined between the center point CP and the first conversion point TP1. A circumferential zone Z2 is defined between the first conversion point TP1 and the optical boundary OB of the lens surface. As shown in FIG. 2, the parallel light ray 211 intersects the optical axis I on the image side A2 of the lens 200 after passing through the optical axis zone Z1. Since the light intersects the optical axis I at the image side A2 of the lens 200, the optical axis area Z1 is a convex surface. Conversely, the parallel rays 212 diverge after passing through the circumferential zone Z2. As shown in FIG. 2, the extension line EL of the parallel light 212 after passing through the circumferential area Z2 intersects the optical axis I at the object side A1 of the lens 200, that is, the focal point of the parallel light 212 passing through the circumferential area Z2 is located at the point M of the object side A1 of the lens 200 . Since the extension line EL of the light intersects the optical axis I at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. In the lens 200 shown in FIG. 2, the first conversion point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface.

On the other hand, the unevenness of the optical axis area can be judged according to the judgment method of ordinary knowledge in the field, that is, the sign of the paraxial curvature radius (abbreviated as R value) is used to judge the optical axis area surface of the lens. Shaped bumps. The R value can be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in the lens data sheet of optical design software. For the object side surface, when the R value is positive, it is determined that the optical axis area of the object side surface is convex; when the R value is negative, it is determined that the optical axis area of the object side surface is concave. Conversely, for the image side, when the R value is positive, it is determined that the optical axis area of the image side is concave; when the R value is negative, it is determined that the optical axis area of the image side is convex. The result of this method is consistent with the result of the aforementioned method of judging by the intersection of the ray/ray extension line and the optical axis. The method of judging the intersection of the ray/ray extension line and the optical axis is that the focus of a ray parallel to the optical axis is located on the lens The object side or the image side to determine the surface unevenness. The "a region is convex (or concave)", "a region is convex (or concave)" or "a convex (or concave) region" described in this manual can be used interchangeably.

FIGS. 3 to 5 provide examples of determining the surface shape and the area boundary of the lens area in each case, including the aforementioned optical axis area, circumferential area, and relay area.

FIG. 3 is a radial cross-sectional view of the lens 300. Referring to FIG. 3, the image side surface 320 of the lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis area Z1 and the circumferential area Z2 of the image side surface 320 of the lens 300 are shown in FIG. 3. The R value of the image side surface 320 is positive (that is, R>0), and therefore, the optical axis area Z1 is a concave surface.

Generally speaking, the surface shape of each area bounded by the conversion point will be opposite to the surface shape of the adjacent area. Therefore, the conversion point can be used to define the conversion of the surface shape, that is, from the conversion point from a concave surface to a convex surface or from a convex surface to a concave surface. In FIG. 3, since the optical axis area Z1 is a concave surface and the surface shape changes at the transition point TP1, the circumferential area Z2 is a convex surface.

FIG. 4 is a radial cross-sectional view of the lens 400. Referring to FIG. 4, there is a first switching point TP1 and a second switching point TP2 on the object side 410 of the lens 400. The optical axis area Z1 of the object side surface 410 is defined between the optical axis I and the first conversion point TP1. The R value of the side surface 410 of the object is positive (that is, R>0), and therefore, the optical axis area Z1 is a convex surface.

A circumferential area Z2 is defined between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400, and the circumferential area Z2 of the object side surface 410 is also a convex surface. In addition, a relay zone Z3 is defined between the first conversion point TP1 and the second conversion point TP2, and the relay zone Z3 of the object side surface 410 is a concave surface. 4 again, the object side surface 410 includes the optical axis area Z1 between the optical axis I and the first conversion point TP1 radially outward from the optical axis I, and is located between the first conversion point TP1 and the second conversion point TP2. The relay zone Z3 and the circumferential zone Z2 between the second switching point TP2 and the optical boundary OB of the object side surface 410 of the lens 400. Since the optical axis zone Z1 is a convex surface, the surface shape is transformed from the first switching point TP1 to a concave surface, so the relay zone Z3 is a concave surface, and the surface shape is transformed from the second switching point TP2 to a convex surface, so the circumferential zone Z2 is a convex surface.

FIG. 5 is a radial cross-sectional view of the lens 500. The object side 510 of the lens 500 has no transition point. For a lens surface without a conversion point, such as the object side 510 of the lens 500, 0-50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, from the optical axis I to the lens surface optics The 50-100% of the distance between the boundaries OB is the circumferential area. Referring to the lens 500 shown in FIG. 5, 50% of the distance from the optical axis I to the optical boundary OB on the surface of the lens 500 is defined as the optical axis zone Z1 of the object side surface 510. The R value of the side surface 510 of the object is positive (that is, R>0), and therefore, the optical axis area Z1 is a convex surface. Since the object side surface 510 of the lens 500 has no transition point, the circumferential area Z2 of the object side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential area Z2.

As shown in FIG. 6, the optical imaging lens 1 of the present invention, from the object side A1 where the object is placed (not shown) to the image side A2 where the image is formed, is mainly composed of six lenses along the optical axis I. It includes an aperture 80, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60, and an image plane 91 in sequence. Generally speaking, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60 can all be made of transparent plastic materials, but the present invention does not This is limited. Each lens has an appropriate refractive power. In the optical imaging lens 1 of the present invention, the lenses with refractive power have only six lenses: the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60. . The optical axis I is the optical axis of the entire optical imaging lens 1, so the optical axis of each lens and the optical axis of the optical imaging lens 1 are the same.

In addition, the optical imaging lens 1 further includes an aperture stop 80, which is set at an appropriate position. In FIG. 6, the aperture 80 is provided between the first lens 10 and the object side A1. When the light (not shown) emitted by the object to be photographed (not shown) at the object side A1 enters the optical imaging lens 1 of the present invention, it will sequentially pass through the aperture 80, the first lens 10, and the second lens 20 After the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 and the filter 90, they will be focused on the imaging surface 91 of the image side A2 to form a clear image. In each embodiment of the present invention, the filter 90 is arranged between the sixth lens 60 and the imaging surface 91, and it can be a filter with various suitable functions, such as: for example: infrared cut-off filter (infrared cut- off filter), which is used to prevent infrared rays in the imaging light from being transmitted to the imaging surface 91 and affecting the imaging quality.

Each lens in the optical imaging lens 1 of the present invention has an object side surface facing the object side A1 and passing the imaging light, and an image side surface facing the image side A2 and passing the imaging light. In addition, each lens in the optical imaging lens 1 of the present invention also has an optical axis area and a circumferential area. For example, the first lens 10 has an object side surface 11 and an image side surface 12; the second lens 20 has an object side surface 21 and an image side surface 22; the third lens 30 has an object side surface 31 and an image side surface 32; and the fourth lens 40 has an object side surface 41 and an image side surface. The image side surface 42; the fifth lens 50 has an object side surface 51 and an image side surface 52; the sixth lens 60 has an object side surface 61 and an image side surface 62. Each object side surface and image side surface respectively have an optical axis area and a circumferential area.

Each lens in the optical imaging lens 1 of the present invention also has a thickness T located on the optical axis I, respectively. For example, the first lens 10 has a first lens thickness T1, the second lens 20 has a second lens thickness T2, the third lens 30 has a third lens thickness T3, the fourth lens 40 has a fourth lens thickness T4, and the fifth lens 50 It has a fifth lens thickness T5, and the sixth lens 60 has a sixth lens thickness T6. Therefore, the total thickness of the six lenses on the optical axis I of the first lens 10 to the sixth lens 60 in the optical imaging lens 1 of the present invention is called ALT. That is, ALT = T1 + T2 + T3 + T4 + T5 + T6.

In addition, in the optical imaging lens 1 of the present invention, there is an air gap located on the optical axis I between each lens. For example, the air gap between the first lens 10 and the second lens 20 is called G12, the air gap between the second lens 20 and the third lens 30 is called G23, and the air gap between the third lens 30 and the fourth lens 40 is called G34, The air gap between the fourth lens 40 and the fifth lens 50 is called G45, and the air gap between the fifth lens 50 and the sixth lens 60 is called G56. Therefore, the sum of the five air gaps on the optical axis I from the first lens 10 to the sixth lens 60 is called AAG. That is, AAG = G12+G23+G34+G45+G56.

In addition, the distance from the object side 11 of the first lens 10 to the imaging surface 91 on the optical axis I is the system length TTL of the optical imaging lens 1. The effective focal length of the optical imaging lens 1 is EFL, and the distance from the object side surface 11 of the first lens 10 to the image side surface 62 of the sixth lens 60 on the optical axis I is TL. HFOV is the half angle of view of the optical imaging lens 1, that is, half of the maximum field of view (Field of View), ImgH is the image height of the optical imaging lens 1, and Fno is the aperture value of the optical imaging lens 1.

When the filter 90 is arranged between the sixth lens 60 and the imaging surface 91, G6F represents the air gap from the sixth lens 60 to the filter 90 on the optical axis I, and TF represents the filter 90 on the optical axis I. The thickness above, GFP represents the air gap between the filter 90 and the imaging surface 91 on the optical axis I, and BFL is the back focal length of the optical imaging lens 1, that is, the image side 62 of the sixth lens 60 to the imaging surface 91 are on the optical axis I The distance above is BFL=G6F+TF+GFP.

In addition, redefine: f1 is the focal length of the first lens 10; f2 is the focal length of the second lens 20; f3 is the focal length of the third lens 30; f4 is the focal length of the fourth lens 40; f5 is the focal length of the fifth lens 50; f6 is the focal length of the sixth lens 60; n1 is the refractive index of the first lens 10; n2 is the refractive index of the second lens 20; n3 is the refractive index of the third lens 30; n4 is the refractive index of the fourth lens 40; n5 Is the refractive index of the fifth lens 50; n6 is the refractive index of the sixth lens 60; υ1 is the Abbe number of the first lens 10; υ2 is the Abbe number of the second lens 20; υ3 is the Abbe number of the third lens 30 Coefficient; υ4 is the Abbe coefficient of the fourth lens 40; υ5 is the Abbe coefficient of the fifth lens 50; υ6 is the Abbe coefficient of the sixth lens 60.

Another definition in the present invention: Gmax is the largest air gap between the first lens to the sixth lens on the optical axis, that is, the maximum value of G12, G23, G34, G45, G56; ALT24 is the second lens 20 to the fourth lens 40 The sum of the three thicknesses on the optical axis I, that is, the sum of T2, T3, and T4; ALT35 is the sum of the three thicknesses of the third lens 30 to the fifth lens 50 on the optical axis I, that is, the sum of T3, T4, and T5 Sum; ALT46 is the sum of the three thicknesses of the fourth lens 40 to the sixth lens 60 on the optical axis I, that is, the sum of T4, T5, and T6; L12t62 is the image side surface 12 of the first lens 10 to the sixth lens 60 The distance of the image side 62 on the optical axis I; L12t41 is the distance from the image side 12 of the first lens 10 to the object side 41 of the fourth lens 40 on the optical axis I; L41t62 is the distance from the object side 41 to the first lens 40 of the fourth lens 40 The distance between the image side 62 of the six lens 60 on the optical axis I; L11t42 is the distance from the object side 11 of the first lens 10 to the image side 42 of the fourth lens 40 on the optical axis I; L21t52 is the object of the second lens 20 The distance from the side 21 to the image side 52 of the fifth lens 50 on the optical axis I; L12t61 is the distance from the image side 12 of the first lens 10 to the object side 61 of the sixth lens 60 on the optical axis I; CT is any The thickness of the lens on the optical axis I, that is, the thickness of the center of the lens; ET is the distance from the optical boundary on the object side of any lens to the optical boundary on the image side in the direction of the optical axis I, that is, the thickness of the lens circumference.

The first embodiment

Please refer to FIG. 6, which illustrates a first embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 7A for the longitudinal spherical aberration on the imaging surface 91 in the first embodiment, and refer to FIG. 7B for the field curvature aberration in the sagittal direction. Please refer to Fig. 7C for curvature aberration and Fig. 7D for distortion aberration. The Y-axis of each spherical aberration diagram in all embodiments represents the field of view, and the highest point is 1.0. The Y-axis of each aberration diagram and distortion diagram in the embodiments represents the image height. The system image height of the first embodiment ( Image Height, ImgH) is 2.580 mm.

The optical imaging lens 1 of the first embodiment is mainly composed of six lenses with refractive power, an aperture 80 and an imaging surface 91. The aperture 80 of the first embodiment is arranged between the first lens 10 and the object side A1.

The first lens 10 has positive refractive power. The optical axis area 13 of the object side surface 11 of the first lens 10 is convex and the circumferential area 14 thereof is convex. The optical axis area 16 of the image side surface 12 of the first lens 10 is convex and the circumferential area 17 thereof is convex. The object side surface 11 and the image side surface 12 of the first lens 10 are both aspherical, but not limited to this.

The second lens 20 has a negative refractive power. The optical axis area 23 of the object side surface 21 of the second lens 20 is concave and the circumferential area 24 thereof is concave. The optical axis area 26 of the image side surface 22 of the second lens 20 is convex and the circumferential area 27 thereof is convex. The object side surface 21 and the image side surface 22 of the second lens 20 are both aspherical, but not limited to this.

The third lens 30 has a positive refractive power. The optical axis area 33 of the object side surface 31 of the third lens 30 is concave and its circumferential area 34 is concave. The optical axis area 36 of the image side surface 32 of the third lens 30 is convex and its The circumferential area 37 is convex. The object side surface 31 and the image side surface 32 of the third lens 30 are both aspherical, but not limited to this.

The fourth lens 40 has a positive refractive power. The optical axis area 43 of the object side surface 41 of the fourth lens 40 is concave and its circumferential area 44 is concave. The optical axis area 46 of the image side surface 42 of the fourth lens 40 is convex and its The circumferential area 47 is convex. The object side surface 41 and the image side surface 42 of the fourth lens 40 are both aspherical, but not limited to this.

The fifth lens 50 has a positive refractive power. The optical axis area 53 of the object side 51 of the fifth lens 50 is concave and its circumferential area 54 is concave. The optical axis area 56 of the image side 52 of the fifth lens 50 is convex and its The circumferential area 57 is convex. The object side surface 51 and the image side surface 52 of the fifth lens 50 are both aspherical, but not limited to this.

The sixth lens 60 has a positive refractive power. The optical axis area 63 of the object side 61 of the sixth lens 60 is concave and its circumferential area 64 is convex. The optical axis area 66 of the image side 62 of the sixth lens 60 is convex and its The circumferential area 67 is convex. The object side surface 61 and the image side surface 62 of the sixth lens 60 are both aspherical, but not limited to this.

In the optical imaging lens 1 of the present invention, from the first lens 10 to the sixth lens 60, all the object side 11/21/31/41/51/61 and the image side 12/22/32/42/52/62 A total of twelve curved surfaces are all aspherical, but not limited to this. If it is aspherical, then these aspherical systems are defined by the following formula:

in:

Y represents the vertical distance between the point on the aspheric surface and the optical axis I;

Z represents the depth of the aspheric surface (the point on the aspheric surface that is Y from the optical axis I, and the tangent to the vertex on the optical axis I of the aspheric surface, and the vertical distance between the two);

R represents the radius of curvature of the lens surface near the optical axis I;

K is the conic constant;

a _2i is the 2i-th order aspheric coefficient.

The optical data of the optical imaging lens system of the first embodiment is shown in FIG. 20, and the aspheric surface data is shown in FIG. 21. In the optical imaging lens system of the following embodiment, the aperture value (f-number) of the overall optical imaging lens is Fno, the effective focal length is (EFL), and the half field of view (Half Field of View, HFOV) is the overall optical imaging lens. Half of the maximum field of view (Field of View), where the image height, radius of curvature, thickness, and focal length of the optical imaging lens are in millimeters (mm). In this embodiment, EFL=7.482 mm; HFOV=15.845 degrees; TTL=7.288 mm; Fno=2.840; ImgH=2.580 mm.

Second embodiment

Please refer to FIG. 8, which illustrates a second embodiment of the optical imaging lens 1 of the present invention. Please note that starting from the second embodiment, in order to simplify and clearly express the drawings, only the optical axis area and the circumferential area of each lens with a different surface shape from the first embodiment are specifically marked on the figure, and the rest are the same as those of the first embodiment. The optical axis area and the circumferential area of the same surface shape of the lens, such as a concave or convex surface, are not separately labeled. Please refer to FIG. 9A for the longitudinal spherical aberration on the imaging surface 91 in the second embodiment, refer to FIG. 9B for the field curvature aberration in the sagittal direction, refer to FIG. 9C for the meridional field curvature aberration, and refer to FIG. 9D for the distortion aberration . The design of the second embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the circumferential area 24 of the object side 21 of the second lens 20 is convex, the optical axis area 26 of the image side 22 of the second lens 20 is concave, and the circumferential area 27 of the second lens 20 is concave. The optical axis area 43 of the object side surface 41 is convex, the fifth lens 50 has negative refractive power, the optical axis area 56 of the image side surface 52 of the fifth lens 50 is concave, and the optical axis area 63 of the object side surface 61 of the sixth lens 60 It is a convex surface and its circumferential area 64 is a concave surface.

The detailed optical data of the second embodiment is shown in FIG. 22, and the aspheric surface data is shown in FIG. 23. In this embodiment, EFL=5.812 mm; HFOV=24.754 degrees; TTL=6.190 mm; Fno=2.325; ImgH=2.520 mm. In particular: 1. The aperture value of this embodiment is smaller than the aperture value of the first embodiment; 2. The longitudinal spherical aberration of this embodiment is smaller than that of the first embodiment; 3. Field curvature in the sagittal direction of this embodiment The aberration is smaller than the curvature of field aberration in the sagittal direction of the first embodiment; 4. The curvature of field aberration in the meridian direction of this embodiment is smaller than the curvature of field aberration in the meridian direction of the first embodiment; 5. The distortion aberration of this embodiment The distortion aberration is smaller than that of the first embodiment.

The third embodiment

Please refer to FIG. 10, which illustrates a third embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging surface 91 of the third embodiment, please refer to FIG. 11A, the curvature of field aberration in the sagittal direction, please refer to FIG. 11B, the curvature of field aberration in the tangential direction, please refer to FIG. 11C, and the distortion aberration, please refer to FIG. 11D . The design of the third embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the circumferential area 24 of the object side surface 21 of the second lens 20 is convex, the optical axis area 26 of the image side surface 22 of the second lens 20 is concave and its circumferential area 27 is concave. The third lens 30 has Negative refractive power, the fourth lens 40 has negative refractive power, the optical axis area 46 of the image side 42 of the fourth lens 40 is concave, the fifth lens 50 has negative refractive power, and the object side 51 of the fifth lens 50 The optical axis area 53 is a convex surface, the optical axis area 56 of the image side surface 52 of the fifth lens 50 is a concave surface, the optical axis area 63 of the object side surface 61 of the sixth lens 60 is a convex surface, and its circumferential area 64 is a concave surface.

The detailed optical data of the third embodiment is shown in Fig. 24, and the aspherical data is shown in Fig. 25. In this embodiment, EFL=8.064 mm; HFOV=13.292 degrees; TTL=10.080 mm; Fno=2.800; ImgH = 2.520 mm. In particular: 1. The aperture value of this embodiment is smaller than that of the first embodiment; 2. The longitudinal spherical aberration of this embodiment is smaller than that of the first embodiment; 3. Field curvature in the sagittal direction of this embodiment The aberration is smaller than the curvature of field aberration in the sagittal direction of the first embodiment; 4. The curvature of field aberration in the meridian direction of this embodiment is smaller than the curvature of field aberration in the meridian direction of the first embodiment; 5. The distortion aberration of this embodiment Less than the distortion aberration of the first embodiment; 6. The effective focal length of this embodiment is greater than the effective focal length of the first embodiment.

Fourth embodiment

Please refer to FIG. 12, which illustrates a fourth embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 13A for the longitudinal spherical aberration on the imaging plane 91 of the fourth embodiment, refer to FIG. 13B for the field curvature aberration in the sagittal direction, refer to FIG. 13C for the meridional field curvature aberration, and refer to FIG. 13D for the distortion aberration . The design of the fourth embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis area 26 of the image side 22 of the second lens 20 is concave, the third lens 30 has negative refractive power, the fifth lens 50 has negative refractive power, and the object side of the fifth lens 50 The optical axis region 53 of 51 is a convex surface, and the optical axis region 56 of the image side surface 52 of the fifth lens 50 is a concave surface.

The detailed optical data of the fourth embodiment is shown in FIG. 26, and the aspheric surface data is shown in FIG. 27. In this embodiment, EFL=11.211 mm; HFOV=12.949 degrees; TTL=9.692 mm; Fno=3.503; ImgH=2.520 mm. In particular: 1. The longitudinal spherical aberration of this embodiment is smaller than that of the first embodiment; 2. The distortion aberration of this embodiment is smaller than that of the first embodiment; 3. The effective focal length of this embodiment is greater than Effective focal length of the first embodiment.

Fifth embodiment

Please refer to FIG. 14, which illustrates a fifth embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 15A for the longitudinal spherical aberration on the imaging surface 91 of the fifth embodiment, refer to FIG. 15B for the field curvature aberration in the sagittal direction, refer to FIG. 15C for the meridional field curvature aberration, and refer to FIG. 15D for the distortion aberration . The design of the fifth embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis area 23 of the object side surface 21 of the second lens 20 is a convex surface and its circumferential area 24 is convex, and the optical axis area 26 of the image side surface 22 of the second lens 20 is a concave surface and its circumferential area 27 It is a concave surface, the third lens 30 has negative refractive power, the fourth lens 40 has negative refractive power, the optical axis area 46 of the image side surface 42 of the fourth lens 40 is concave, and the fifth lens 50 has negative refractive power. The optical axis area 53 of the object side surface 51 of the five lens 50 is convex, the optical axis area 56 of the image side surface 52 of the fifth lens 50 is concave, and the sixth lens 60 has a negative refractive power.

The detailed optical data of the fifth embodiment is shown in Fig. 28, and the aspherical data is shown in Fig. 29. In this embodiment, EFL=17.755 mm; HFOV=12.269 degrees; TTL=10.738 mm; Fno=5.548; ImgH = 2.536 mm. In particular: 1. The effective focal length of this embodiment is greater than the effective focal length of the first embodiment.

Sixth embodiment

Please refer to FIG. 16, which illustrates a sixth embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 17A for the longitudinal spherical aberration on the imaging surface 91 of the sixth embodiment, refer to FIG. 17B for the field curvature aberration in the sagittal direction, refer to FIG. 17C for the meridional field curvature aberration, and refer to FIG. 17D for the distortion aberration . The design of the sixth embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis area 23 of the object side surface 21 of the second lens 20 is a convex surface and its circumferential area 24 is convex, and the optical axis area 26 of the image side surface 22 of the second lens 20 is a concave surface and its circumferential area 27 It is a concave surface, the third lens 30 has a negative refractive power, the optical axis area 36 of the image side surface 32 of the third lens 30 is a concave surface and its circumferential area 37 is a concave surface, and the optical axis area 43 of the object side surface 41 of the fourth lens 40 is Convex surface, the optical axis area 46 of the image side 42 of the fourth lens 40 is concave, the fifth lens 50 has a negative refractive power, the optical axis area 53 of the object side 51 of the fifth lens 50 is convex, and the image of the fifth lens 50 The optical axis area 56 of the side surface 52 is a concave surface, and the circumferential area 64 of the object side surface 61 of the sixth lens 60 is a concave surface.

The detailed optical data of the sixth embodiment is shown in Fig. 30, and the aspherical data is shown in Fig. 31. In this embodiment, EFL=9.008 mm; HFOV=15.881 degrees; TTL=8.263 mm; Fno=2.800; ImgH = 2.520 mm. In particular: 1. The aperture value of this embodiment is smaller than that of the first embodiment; 2. The longitudinal spherical aberration of this embodiment is smaller than that of the first embodiment; 3. Field curvature in the sagittal direction of this embodiment The aberration is smaller than the curvature of field aberration in the sagittal direction of the first embodiment; 4. The curvature of field aberration in the meridian direction of this embodiment is smaller than the curvature of field aberration in the meridian direction of the first embodiment; 5. The distortion aberration of this embodiment Less than the distortion aberration of the first embodiment; 6. The effective focal length of this embodiment is greater than the effective focal length of the first embodiment.

Seventh embodiment

Please refer to FIG. 18, which illustrates a seventh embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 19A for the longitudinal spherical aberration on the imaging surface 91 of the seventh embodiment, refer to FIG. 19B for the curvature of field aberration in the sagittal direction, refer to FIG. 19C for the field curvature aberration in the tangential direction, and refer to FIG. 19D for the distortion aberration . The design of the seventh embodiment is similar to that of the first embodiment, except for the difference in related parameters such as lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient, or back focal length. In addition, in this embodiment, the circumferential area 24 of the object side surface 21 of the second lens 20 is convex, the optical axis area 26 of the image side surface 22 of the second lens 20 is concave and its circumferential area 27 is concave. The third lens 30 has With negative refractive power, the optical axis area 33 of the object side surface 31 of the third lens 30 is convex and its circumferential area 34 is convex. The optical axis area 36 of the image side surface 32 of the third lens 30 is concave and its circumferential area 37 is concave. , The optical axis area 43 of the object side 41 of the fourth lens 40 is convex, the optical axis area 46 of the image side 42 of the fourth lens 40 is concave, the fifth lens 50 has negative refractive power, and the object side of the fifth lens 50 The optical axis area 53 of 51 is a convex surface, the optical axis area 56 of the image side surface 52 of the fifth lens 50 is a concave surface, and the optical axis area 63 of the object side surface 61 of the sixth lens 60 is a convex surface.

The detailed optical data of the seventh embodiment is shown in Fig. 32, and the aspheric data is shown in Fig. 33. In this embodiment, EFL=8.464 mm; HFOV=16.160 degrees; TTL=7.729 mm; Fno=2.800; ImgH = 2.520 mm. In particular: 1. The aperture value of this embodiment is smaller than that of the first embodiment; 2. The longitudinal spherical aberration of this embodiment is smaller than that of the first embodiment; 3. Field curvature in the sagittal direction of this embodiment The aberration is smaller than the curvature of field aberration in the sagittal direction of the first embodiment; 4. The curvature of field aberration in the meridian direction of this embodiment is smaller than the curvature of field aberration in the meridian direction of the first embodiment; 5. The distortion aberration of this embodiment Less than the distortion aberration of the first embodiment; 6. The effective focal length of this embodiment is greater than the effective focal length of the first embodiment.

In addition, the important parameters of each embodiment are summarized in FIG. 34.

The various embodiments of the present invention provide an optical imaging lens with good imaging quality. For example, the concave-convex design that satisfies the following lens surface shape can effectively reduce field curvature and distortion rate, has the characteristics of optimizing the imaging quality of the optical imaging lens system, and the corresponding effects that can be achieved:

1. When the following conditions are met: the sum of the five air gaps of the first lens to the sixth lens on the optical axis is greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis, and the second lens to The object side and the image side of the fifth lens are aspherical, and the following conditions can be used to reduce the difference between the center thickness and the circumferential thickness of the second lens to the fifth lens, so as to improve the injection molding. Yield rate, while increasing the system focal length of the optical imaging lens and maintaining the aperture value; the difference between the center thickness and the circumferential thickness of the second lens to the fifth lens can refer to the conditional expression 0.300≦CT/ET≦2.000, which is better The range is 0.400≦CT/ET≦1.600:

(1) The circumferential area of the image side surface of the sixth lens is convex, and the largest air gap is between the second lens and the third lens and satisfies the conditional formula of 2.000≦EFL/ImgH. The preferable limit is 2.000≦EFL/ ImgH≦10.000.

(2) The first lens has positive refractive power, the optical axis area of the image side of the sixth lens is convex, and the largest air gap is between the second lens and the fourth lens and satisfies the condition of 3.200≦EFL/ImgH The preferred range is 3.200≦EFL/ImgH≦10.000.

(3) The second lens has negative refractive power, the circumferential area of the object side of the fourth lens is concave, the circumferential area of the image side of the sixth lens is convex, and the largest air gap is between the first lens and the fourth lens It satisfies the conditional formula of 2.900≦EFL/ImgH, and the preferable range is 2.900≦EFL/ImgH≦10.000.

2. The optical imaging lens of the present invention further satisfies υ1+υ2+υ3+υ4+υ5+υ6≦255.000, υ2+υ3+υ4+υ5+υ6≦200.000 or υ2+υ3+υ4+υ5≦170.000, which is beneficial to increase optics The effective focal length of the imaging lens, while correcting chromatic aberrations. The preferred range is 150.000≦υ1+υ2+υ3+υ4+υ5+υ6≦255.000, 90.000≦υ2+υ3+υ4+υ5+υ6≦200.000 or 70.000≦υ2+υ3+υ4+υ5≦170.000.

3. The optical imaging lens of the present invention further satisfies the following conditional formulas, which helps to maintain the effective focal length and optical parameters at an appropriate value, avoiding any parameter that is too large and is not conducive to the correction of the overall aberration of the optical imaging system, or Avoid any parameter that is too small to affect assembly or increase the difficulty of manufacturing:

(1) 0.800≦EFL/TTL, the preferred range is 0.800≦EFL/TTL≦1.700;

(2) 1.100 ≦EFL/TL≦1.800, the preferred range is 1.100 ≦EFL/TL≦1.800; and

(3) 2.000 ≦EFL/ALT, the preferred range is 2.000 ≦EFL/ALT≦3.900.

4. The optical imaging lens of the present invention further satisfies the following conditional expressions, which helps to keep the thickness and spacing of each lens at an appropriate value, avoids any parameter being too large and is not conducive to the overall thinning of the optical imaging lens, or avoids any One parameter is too small to affect assembly or increase the difficulty of manufacturing:

(1) L12t61/AAG≦1.600, the preferred range is 1.000≦L12t61/AAG≦1.600;

(2) L12t41/(T1+T6)≦3.000, the preferred range is 0.600≦L12t41/(T1+T6)≦3.000;

(3) L41t62/T1≦3.600, the preferred range is 0.800≦L41t62/T1≦3.600;

(4) L11t42/(G23+G34)≦2.000, the preferred range is 1.100≦L11t42/(G23+G34)≦2.000;

(5) L21t52/(G23+G45)≦2.400, the preferred range is 1.200≦L21t52/(G23+G45)≦2.400;

(6) L12t61/(G23+G56)≦2.700, the preferred range is 1.800≦L12t61/(G23+G56)≦2.700;

(7) (ALT24+G12+BFL)/Gmax≦2.200, the preferred range is 0.600≦(ALT24+G12+BFL)/Gmax≦2.200;

(8) (ALT35+G12+BFL)/Gmax≦2.600, the preferred range is 0.600≦(ALT35+G12+BFL)/Gmax≦2.600;

(9) (ALT46+G12+BFL)/Gmax≦2.300, the preferred range is 0.700≦(ALT46+G12+BFL)/Gmax≦2.300; and

(10) (G12+G34+BFL)/T1≦5.300, the preferred range is 0.700≦(G12+G34+BFL)/T1≦5.300.

5. The optical imaging lens of the present invention further satisfies the following conditional expressions, which helps to maintain an appropriate value for the aperture value and optical parameters, avoiding any parameter being too large and not conducive to the reduction of the aperture value, or avoiding any parameter being too small to affect Assemble or increase the difficulty of manufacturing:

2*ImgH*Fno/EFL≦2.000, the preferred range is 1.300≦2*ImgH*Fno/EFL≦2.000.

The three off-axis rays of 470 nm, 555 nm, and 650 nm representing wavelengths at different heights in each embodiment of the present invention are concentrated near the imaging point, and the off-axis rays of different heights can be seen from the deflection amplitude of each curve. The deviation of the imaging point of the light is controlled and has good spherical aberration, aberration, and distortion suppression capabilities. Further referring to the imaging quality data, the distances between the three representative wavelengths of 470nm, 555nm and 650nm are also quite close to each other, which shows that the embodiment of the present invention has good concentration of light of different wavelengths under various conditions and has excellent performance. Dispersion suppression ability, so it can be seen from the above that the embodiment of the present invention has good optical performance.

The combination ratio relationship of the optical parameters disclosed in each embodiment of the present invention can be implemented according to the obtained numerical range including the maximum and minimum values.

In addition, any combination of the embodiment parameters can be selected to increase the lens limit, so as to facilitate the lens design of the present invention with the same architecture.

In view of the unpredictability of the optical system design, under the framework of the present invention, meeting the above conditional expressions can better shorten the length of the system of the present invention, increase the aperture, improve the image quality, or increase the assembly yield rate to improve the prior art. However, the use of plastic material for the lens of the embodiment of the present invention can further reduce the weight and cost of the lens.

The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention. The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention.

1: Optical imaging lens 11, 21, 31, 41, 51, 61, 110, 410, 510: Object side 12, 22, 32, 42, 52, 62, 120, 320: like side 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, Z1: Optical axis area 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, Z2: Circle area 10: The first lens 20: second lens 30: third lens 40: fourth lens 50: Fifth lens 60: sixth lens 80: aperture 90: filter 91: imaging surface 100, 200, 300, 400, 500: lens 130: Assembly Department 211, 212: parallel rays A1: Object side A2: Image side CP: central point CP1: the first center point CP2: second center point TP1: The first transition point TP2: second transition point OB: Optical boundary I: Optical axis Lc: chief ray Lm: marginal light EL: extension cord Z3: Relay zone M, R: intersection point T1, T2, T3, T4, T5, T6: the thickness of each lens on the optical axis

1 to 5 are schematic diagrams of the method for judging the curvature shape of the optical imaging lens of the present invention. FIG. 6 is a schematic diagram of the first embodiment of the optical imaging lens of the present invention. FIG. 7A illustrates the longitudinal spherical aberration on the imaging surface of the first embodiment. FIG. 7B illustrates the curvature of field aberration in the sagittal direction of the first embodiment. FIG. 7C illustrates the curvature of field aberration in the tangential direction of the first embodiment. FIG. 7D shows the distortion aberration of the first embodiment. FIG. 8 is a schematic diagram of a second embodiment of the optical imaging lens of the present invention. FIG. 9A illustrates the longitudinal spherical aberration on the imaging surface of the second embodiment. FIG. 9B illustrates the curvature of field aberration in the sagittal direction of the second embodiment. FIG. 9C illustrates the curvature of field aberration in the tangential direction of the second embodiment. FIG. 9D illustrates the distortion aberration of the second embodiment. FIG. 10 is a schematic diagram of a third embodiment of the optical imaging lens of the present invention. FIG. 11A illustrates the longitudinal spherical aberration on the imaging surface of the third embodiment. FIG. 11B illustrates the curvature of field aberration in the sagittal direction of the third example. FIG. 11C illustrates the curvature of field aberration in the tangential direction of the third example. FIG. 11D shows the distortion aberration of the third embodiment. FIG. 12 is a schematic diagram of a fourth embodiment of the optical imaging lens of the present invention. FIG. 13A illustrates the longitudinal spherical aberration on the imaging surface of the fourth embodiment. FIG. 13B illustrates the curvature of field aberration in the sagittal direction of the fourth example. FIG. 13C illustrates the curvature of field aberration in the tangential direction of the fourth example. FIG. 13D shows the distortion aberration of the fourth embodiment. FIG. 14 is a schematic diagram of a fifth embodiment of the optical imaging lens of the present invention. FIG. 15A shows the longitudinal spherical aberration on the imaging surface of the fifth embodiment. FIG. 15B illustrates the curvature of field aberration in the sagittal direction of the fifth example. FIG. 15C illustrates the curvature of field aberration in the tangential direction of the fifth example. FIG. 15D shows the distortion aberration of the fifth embodiment. FIG. 16 is a schematic diagram of a sixth embodiment of the optical imaging lens of the present invention. FIG. 17A shows the longitudinal spherical aberration on the imaging surface of the sixth embodiment. FIG. 17B illustrates the curvature of field aberration in the sagittal direction of the sixth example. FIG. 17C illustrates the curvature of field aberration in the tangential direction of the sixth example. FIG. 17D shows the distortion aberration of the sixth example. FIG. 18 is a schematic diagram of a seventh embodiment of the optical imaging lens of the present invention. FIG. 19A shows the longitudinal spherical aberration on the imaging surface of the seventh embodiment. FIG. 19B illustrates the curvature of field aberration in the sagittal direction of the seventh example. FIG. 19C illustrates the curvature of field aberration in the tangential direction of the seventh example. FIG. 19D shows the distortion aberration of the seventh example. Fig. 20 shows detailed optical data of the first embodiment. Fig. 21 shows detailed aspheric surface data of the first embodiment. Fig. 22 shows detailed optical data of the second embodiment. Fig. 23 shows detailed aspheric surface data of the second embodiment. Fig. 24 shows detailed optical data of the third embodiment. Fig. 25 shows detailed aspheric surface data of the third embodiment. Fig. 26 shows detailed optical data of the fourth embodiment. Fig. 27 shows detailed aspheric surface data of the fourth embodiment. Fig. 28 shows detailed optical data of the fifth embodiment. Fig. 29 shows detailed aspheric surface data of the fifth embodiment. Fig. 30 shows detailed optical data of the sixth embodiment. Fig. 31 shows detailed aspheric surface data of the sixth embodiment. Fig. 32 shows detailed optical data of the seventh embodiment. Fig. 33 shows detailed aspheric surface data of the seventh embodiment. Fig. 34 shows important parameters of each embodiment.

1: Optical imaging lens

A1: Object side

A2: Image side

I: Optical axis

11, 21, 31, 41, 51, 61: Object side

12, 22, 32, 42, 52, 62: like side

13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66: optical axis area

14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67: circumferential area

10: The first lens

20: second lens

30: third lens

40: fourth lens

50: Fifth lens

60: sixth lens

80: aperture

90: filter

91: imaging surface

T1, T2, T3, T4, T5, T6: the thickness of each lens on the optical axis

Claims (20)

An optical imaging lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from an object side to an image side, Each lens has an object side surface that faces the object side and allows imaging light to pass through, and an image side surface that faces the image side and allows imaging light to pass through. The optical imaging lens includes: A circumferential area of the image side surface of the sixth lens is convex; The optical imaging lens consists of the above six lenses; The sum of the five air gaps on the optical axis of the first lens to the sixth lens is greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis; The largest air gap is between the second lens and the third lens; The object side surface and the image side surface of one of the second lens to the fifth lens are aspherical surfaces; And the following conditional formula is satisfied: 2.000≦EFL/ImgH, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens. An optical imaging lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from an object side to an image side, Each lens has an object side surface that faces the object side and allows imaging light to pass through, and an image side surface that faces the image side and allows imaging light to pass through. The optical imaging lens includes: The first lens has a positive refractive power; An optical axis area of the image side surface of the sixth lens is convex; The optical imaging lens consists of the above six lenses; The sum of the five air gaps on the optical axis of the first lens to the sixth lens is greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis; The largest air gap is between the second lens and the fourth lens; The object side surface and the image side surface of one of the second lens to the fifth lens are aspherical surfaces; And satisfy the following conditional formula: 3.200≦EFL/ImgH, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens. An optical imaging lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from an object side to an image side, Each lens has an object side surface that faces the object side and allows imaging light to pass through, and an image side surface that faces the image side and allows imaging light to pass through. The optical imaging lens includes: The second lens has a negative refractive power; A circumferential area of the object side surface of the fourth lens is a concave surface; A circumferential area of the image side surface of the sixth lens is convex; The optical imaging lens is composed of the above six lenses; The sum of the five air gaps on the optical axis of the first lens to the sixth lens is greater than the sum of the six thicknesses of the first lens to the sixth lens on the optical axis; The largest air gap is between the first lens and the fourth lens; The object side surface and the image side surface of one of the second lens to the fifth lens are aspherical surfaces; And the following conditional formula is satisfied: 2.900≦EFL/ImgH, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein TTL is defined as the distance from the object side of the first lens to an imaging surface on the optical axis, and the optical imaging lens Meet the following conditions: 0.800≦EFL/TTL. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein TL is defined as the distance on the optical axis from the object side of the first lens to the image side of the sixth lens, And the optical imaging lens satisfies the following conditions: 1.100≦EFL/TL. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein ALT is defined as the total thickness of the six lenses on the optical axis from the first lens to the sixth lens, and the optical The imaging lens meets the following conditions: 2.000≦EFL/ALT. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where L12t61 is defined as the distance on the optical axis from the image side surface of the first lens to the image side surface of the sixth lens, AAG defines the sum of five air gaps on the optical axis from the first lens to the sixth lens, and the optical imaging lens satisfies the following condition: L12t61/AAG≦1.600. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where L12t41 is defined as the distance on the optical axis from the image side surface of the first lens to the object side surface of the fourth lens, T1 is defined as the thickness of the first lens on the optical axis, T6 is defined as the thickness of the sixth lens on the optical axis, and the optical imaging lens satisfies the following condition: L12t41/(T1+T6)≦3.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where L41t62 is defined as the distance on the optical axis from the object side of the fourth lens to the image side of the sixth lens, T1 is defined as the thickness of the first lens on the optical axis, and the optical imaging lens satisfies the following condition: L41t62/T1≦3.600. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where υ1 is defined as the Abbe coefficient of the first lens, υ2 is defined as the Abbe coefficient of the second lens, and υ3 is defined as the The Abbe coefficient of the third lens, υ4 is defined as the Abbe coefficient of the fourth lens, υ5 is defined as the Abbe coefficient of the fifth lens, υ6 is defined as the Abbe coefficient of the sixth lens, and the optical imaging lens satisfies The following conditions: υ1+υ2+υ3+υ4+υ5+υ6≦255.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where υ2 is defined as the Abbe coefficient of the second lens, υ3 is defined as the Abbe coefficient of the third lens, and υ4 is defined as the The Abbe coefficient of the fourth lens, υ5 is defined as the Abbe coefficient of the fifth lens, υ6 is defined as the Abbe coefficient of the sixth lens, and the optical imaging lens satisfies the following conditions: υ2+υ3+υ4+υ5+υ6 ≦200.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where υ2 is defined as the Abbe coefficient of the second lens, υ3 is defined as the Abbe coefficient of the third lens, and υ4 is defined as the The Abbe coefficient of the fourth lens, υ5 is defined as the Abbe coefficient of the fifth lens, and the optical imaging lens satisfies the following conditions: υ2+υ3+υ4+υ5≦170.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where L11t42 is defined as the distance on the optical axis from the object side of the first lens to the image side of the fourth lens, G23 is defined as the air gap between the second lens and the third lens on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, and the optical imaging lens satisfies the following conditions ：L11t42/(G23+G34)≦2.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where L21t52 is defined as the distance on the optical axis from the object side of the second lens to the image side of the fifth lens, G23 is defined as the air gap between the second lens and the third lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following conditions ：L21t52/(G23+G45)≦2.500. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where L12t61 is defined as the distance on the optical axis from the image side surface of the first lens to the image side surface of the sixth lens, G23 is defined as the air gap between the second lens and the third lens on the optical axis, G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis, and the optical imaging lens satisfies the following conditions ：L12t61/(G23+G56)≦2.700. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein ALT24 is defined as the sum of the three thicknesses of the second lens to the fourth lens on the optical axis, and G12 is defined as the The air gap between the first lens and the second lens on the optical axis, BFL is defined as the distance from the image side of the sixth lens to an imaging surface on the optical axis, and Gmax is the distance from the first lens to the sixth lens The lens has the largest air gap on the optical axis, and the optical imaging lens meets the following conditions: (ALT24+G12+BFL)/Gmax≦2.220. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein ALT35 is defined as the sum of the three thicknesses of the third lens to the fifth lens on the optical axis, and G12 is defined as the The air gap between the first lens and the second lens on the optical axis, BFL is defined as the distance from the image side of the sixth lens to an imaging surface on the optical axis, and Gmax is the distance from the first lens to the sixth lens The lens has the largest air gap on the optical axis, and the optical imaging lens satisfies the following conditions: (ALT35+G12+BFL)/Gmax≦2.620. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein ALT46 is defined as the sum of the three thicknesses of the fourth lens to the sixth lens on the optical axis, and G12 is defined as the The air gap between the first lens and the second lens on the optical axis, BFL is defined as the distance from the image side of the sixth lens to an imaging surface on the optical axis, and Gmax is the distance from the first lens to the sixth lens The lens has the largest air gap on the optical axis, and the optical imaging lens meets the following conditions: (ALT46+G12+BFL)/Gmax≦2.320. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein T1 is defined as the thickness of the first lens on the optical axis, and G12 is defined as the thickness between the first lens and the second lens The air gap on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, and BFL is defined as the distance from the image side of the sixth lens to an imaging surface on the optical axis Distance, and the optical imaging lens satisfies the following conditions: (G12+G34+BFL)/T1≦5.320. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where Fno is defined as the aperture value of the optical imaging lens, and the optical imaging lens satisfies the following conditions: 2*ImgH*Fno/EFL≦ 2.020.

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